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Evaluating the Role of Immunological Cells (Tissue Eosinophils and Mast Cells) in Progression of Oral Squamous Cell Carcinoma.

Mast cells and eosinophils are increased in oral squamous cell carcinoma. The significance of such an association has been variably thought to be either a potential diagnostic tool for stromal invasion or as a prognostic indicator. The aim of the study was to study the mast cells and eosinophils between normal oral mucosa, leukoplakia and oral squamous cell carcinoma and to study the significance of mast cells in the progression of the lesion. A retrospective study was done on archival tissue received from January 2015 to December 2015, in the Department of Oral Pathology, RUHS College of Dental Sciences, Jaipur, Rajasthan, India. Seventy (70) cases were studied (30 cases each of leukoplakia and carcinoma and 10 cases of control group), sections were stained with toluidine blue solution to reveal mast cells. Eosinophils were studied in Haematoxylin & Eosin stained sections. Mast cell density significantly increased from: normal mucosa to oral leukoplakia to carcinoma, suggesting a role of the mast cells in the development of these lesions. The higher eosinophil counts in carcinoma group compared to dysplasia group proved that they might have a role in stromal invasion. The assessment of these could become, in the future, useful for therapeutic approaches in this subset of the patient.

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